Improvement in mortising-machinb



vented a new and improved lltitied time aient Gemine.

Letters Patent No. 99,064, dated January 25, 1870.

The Schedule referred to in these Letters Patent-and making part of the same.

To all whom it may concern ABe it known that I, JOHN COX, of Portland, in the county of' Multnomah, and State of Oregon, have inlvlortisihgslylachineg 4and I dohereby declare' that the following is a full, clear, and exact description ofthe construction and operation oi' the same, reference being had to the accompanying drawings, making -a part of this specification, in which- Figure 1 is a view in perspective.

`Figure 2 is arfront elevation.

Figures 3 and 4 are detached views of several parts.

This invention consistsl of two metallic standards, set each on a pair of lcin-ved legs, and at a suicient distance from each other to admit oi' placing between them a metallic flame, in the forni ofthe are of' a circle, which frame has sockets on its sides large enough to enclose the said standards, and hasa longitudinal slot of sutlicient width to receive a lever that passes between them, and is pivoted, at its lower end, between legs project-ing downward from the sides of the curved frame, and has, at its extreme lower end, a set of `teeth, which gear with a.toothed comb rising from the upper side ofthe cutter, so that when the lever is moved to and fro upon its pivot, the cutter may receive an oscillating movement sufficient to cause it to enter the wood to .be mortised.

In the drawings- Y F F are two metallic standards, set each upon two curved legs, the said Vstandards being at a sufficient' distance from each other to admit of the introduction between' them of a bent frame, K, which frame may be raised or lowered on the standards F, by reason of a system of cog-wheels, D E, upon the frame, each of whiclrhas a smaller pinion on its shaft, one'of which pinions gears with a set of teeth made in one edgeof one of the standardsF. By rotating, by means of a crank, the cog-wheels, the curved frame K may he raised or lowered at pleasure, their rotation, when not moved by the crank, Vbeing prevented'by a pawl, y.

The trame K has a slot running lengthwise oi' it, suiiiciently wide to receivea lever, A, the lower end of which is pivoted between the lower ends ot' legs a a, extending down, one`from each of the sides of the frame K.

On the lower end of the leverA is a toothed comb, G, which gears with a similar toothed comb, G', on y the upper side of the cutter-head pivoted between the legs a a.

H, the latter being` N, passing loosely vthrough one of the adjacent pairs of curved legs, and longer than the combined width of 'said legs, so that it has some play in them, from end to end.

By turning thel lever M down, when the chain ison the hooks, the chain is made to iirmly clamp the stick of timber, and may he h eld in any required position, by means of a toot-hed bar, L, pivoted to the curved le. s.

(lhe oscillations ofthe lever A impart a reciprocatingmovement to a bar, B, pivoted to the lower part of tile lever, and resting upon one end of the bent frameK.

The har B carries a pawl, C, that engages with the l teeth of the wheel D, and causes the latter, in conf,l junction with the other cog-,wheels of the system, and

the rack in F, to feed the frame K, with the cutter.-V

head, downto its work. s

The pawl O is controlled by a set-screw,'S, which, by raising or lowering its rear end, causes it to takenp one or more ot" the teeth of the wheel D, as maybe required to feed the same faster or slower.

,Having thus described my invention,

That I claim as new, 'and desire to secure byLete ters Patent, is- 4 1. The frame K, carrying the cutter-head H, .and provided with the system ,of` cog-wheels D E, &c combined with the standards F, one or both of which have teeth, in the manner set forth, for the purpose otl raisingand lowering the cutter-head. l

2. ln combination with the above-,the lever A, provided with the toothed comb G, the cutter-head H, provided with the toothed comb G, the bar,B, and pawl O, all arranged and operating substantially as described.

JOHN COX AWitnesses JNO. O. WORK, i R. F. HnNsrLL'. 

